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18 Cards in this Set
- Front
- Back
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What are the 2 major vessels that veins drain into?
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hepatic portal vein and the inferior vena cava
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What is the most inner layer tissue of the GI system?
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mucosa
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What is anastamosis?
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the joining of two spaces
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What is contained within the mucosa?
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epithelium, lamina propria, and muscularis mucosae
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What is the lamina propria?
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connective tissue with blood and lymphatic vessels, nerves, ducts of glands, and lymph nodes (used to keep bacteria under control)
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What is the muscularis mucosae?
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a very narrow band of smooth muscle
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What type of epithelium makes up the esophagus?
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stratified squamous
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What is the advantage of taking suppositories?
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even though it still under goes the 1st pass metabolism it is less than taking it orally
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What makes up the submucosa?
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connective tissue, nerve plexus, blood, lymphatic bessels, lymph nodes, and glands
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Where are ducts that continue from the mucosa to lumen of the GI tract seen?
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the submucosa
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Where is the nerve plexus located?
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submucosal or Meissners plexus is on the outer aspect of submucosa
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What is contained in the muscularis externa?
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circular and longitudinal smooth muscle and nerves (myenteric or Auerbachs plexus)
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What is contained in the adventitia?
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connective tissue with or without serous membrane (serosa; visceral peritoneum)
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How does peristalsis occur?
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Bolus is propelled along tube by constricting muscle behind it and opening muscle in front of it
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True or False
The GI tract has more neurons than the spinal chord |
True
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What is extrinsic innervation controlled by?
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the autonomic nervous system
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What makes up the sympathetic in extrinsic innervation?
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mainly postganglionic adrenergic fibers
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What makes up the parasympathetic in extrinsic innervation?
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mainly preganglionic cholinergic fibers via vagus and pelvic nerves
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